<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>联系一下单文件组件的语法</title>
</head>
<body>
  <!--准备一个容器-->
  <div id='root'>
<!--    <App></App>   写在template里-->
  </div>
  <script type="text/javascript" src="../js/vue.js"></script>
  <script type="text/javascript" src="main.js"></script>
</body>
</html>